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How to Make a Sine Wave in C++

Trigonometric functions are fundamental to physics and engineering. There are three main trigonometric functions -- sine (sin) cosine (cos) and tangent (tan). All of these functions have a periodic dependence; sine and cosine are also oscillatory. C++ is one of the most well known programming languages and is used throughout the software industry, games industry and scientific community. Sometimes, it can be necessary to generate a sine wave within C++.

Things You'll Need

C++ compiler

Instructions

- 1
  Open a new plain text file. Some C++ compilers have a dedicated editor. If this is the case, create a new file.
- 2
  Find the include files that are needed for the program. For this program, two main include files will be needed; "iostream" and "cmath.i". Type the following lines at the top of the new file:
  
  #include <iostream>
  
  #include <cmath>
  
  Type the beginning of the main function, which is where the bulk of the program is placed:
  
  int main()
  
  {
  
  float sinwave [63];
- 3
  Generate the sine function and place it into an array. To do this, a "for loop" is used that increments a variable between two set number limits. Type the following:
  
  for ( n=0; n<6.28; n=n+0.1)
  
  {
  
  sinwave [n]=sin(n);
  
  }
- 4
  Save the file and compile it. The array sin(n) will be filled with a sine wave.

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